[swodo]

03 Heritage seems to sporadically run rich.
Heard that HD has had problems with the vacuum petcock leaking (while the engine is running) and causing a rich condition. If this is common?
Replace with non vaccum Pingel or what other brand do you recommend?

 

[SYCLONE]

03 Heritage seems to sporadically run rich.
Heard that HD has had problems with the vacuum petcock leaking (while the engine is running) and causing a rich condition. If this is common?
Replace with non vaccum Pingel or what other brand do you recommend?

The only thing a vacuum operated petcock can do other than flow all the fuel the float bowl can handle...is to restrict flow and thus cause a lean condition.

 

[LittleBear]

Sounds like it could be a float level problem or a float needle sticking. Pull the float bowl and check it out.
See if you have a bunch of crap in the bowl. If you do, could have some crap stuck in the float needle and seat.

 

[03LowRider]

What if the vacuum diaphragm in the petcock is leaking allowing fuel to be sucked up by the vacuum line? I took mine apart a while back but I can’t remember it fuel can get to the plunger side of the diaphragm.

 

[SYCLONE]

What if the vacuum diaphragm in the petcock is leaking allowing fuel to be sucked up by the vacuum line? I took mine apart a while back but I can’t remember it fuel can get to the plunger side of the diaphragm.

They can leak...but then they dont allow any kind of flow to the bowl cause of the bad diaphram.

 

[ViennaHog]

When you take the carb apart, check enrichener cable/plunger function as well. You need about 1/10" free play when gently pulling the knob with the friction nut loosened. If not plunger/cable binding, very similar symptoms to a leaking float bowl valve.

 

[Fourcats]

vacuum petcock

I've read of a possible problem not REMEMBERING to turn it "ON", from "OFF" when you start the ENGINE. This might cause damage to the diaphram.

"If you can't remember :huh: to turn it on, don't turn it off..."

We had a Pingle, that worked. I was not really comfortable the the lack of a "detent" when going {to/from} ON, OFF, & RESERVE. Always had to look at it...

 

[SYCLONE]

What were we talkin about here???